WO2017126426A1 - Lens alignment adjustment device and projector equipped with same - Google Patents

Lens alignment adjustment device and projector equipped with same Download PDF

Info

Publication number
WO2017126426A1
WO2017126426A1 PCT/JP2017/001004 JP2017001004W WO2017126426A1 WO 2017126426 A1 WO2017126426 A1 WO 2017126426A1 JP 2017001004 W JP2017001004 W JP 2017001004W WO 2017126426 A1 WO2017126426 A1 WO 2017126426A1
Authority
WO
WIPO (PCT)
Prior art keywords
lens
plate
base plate
fixing plate
projection lens
Prior art date
Application number
PCT/JP2017/001004
Other languages
French (fr)
Japanese (ja)
Inventor
憲昭 近本
博之 古井
亨 根村
Original Assignee
Thk株式会社
セイコーエプソン株式会社
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Thk株式会社, セイコーエプソン株式会社 filed Critical Thk株式会社
Priority to US16/070,942 priority Critical patent/US10571785B2/en
Priority to CN201780007176.1A priority patent/CN108475003B/en
Publication of WO2017126426A1 publication Critical patent/WO2017126426A1/en

Links

Images

Classifications

    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
    • G03B21/00—Projectors or projection-type viewers; Accessories therefor
    • G03B21/14—Details
    • G03B21/142—Adjusting of projection optics
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B27/00—Optical systems or apparatus not provided for by any of the groups G02B1/00 - G02B26/00, G02B30/00
    • G02B27/09—Beam shaping, e.g. changing the cross-sectional area, not otherwise provided for
    • G02B27/0938—Using specific optical elements
    • G02B27/095—Refractive optical elements
    • G02B27/0955—Lenses
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B7/00—Mountings, adjusting means, or light-tight connections, for optical elements
    • G02B7/02—Mountings, adjusting means, or light-tight connections, for optical elements for lenses
    • G02B7/022—Mountings, adjusting means, or light-tight connections, for optical elements for lenses lens and mount having complementary engagement means, e.g. screw/thread
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B7/00—Mountings, adjusting means, or light-tight connections, for optical elements
    • G02B7/02—Mountings, adjusting means, or light-tight connections, for optical elements for lenses
    • G02B7/023—Mountings, adjusting means, or light-tight connections, for optical elements for lenses permitting adjustment
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B7/00—Mountings, adjusting means, or light-tight connections, for optical elements
    • G02B7/02—Mountings, adjusting means, or light-tight connections, for optical elements for lenses
    • G02B7/026—Mountings, adjusting means, or light-tight connections, for optical elements for lenses using retaining rings or springs
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N9/00—Details of colour television systems
    • H04N9/12—Picture reproducers
    • H04N9/31—Projection devices for colour picture display, e.g. using electronic spatial light modulators [ESLM]
    • H04N9/3102—Projection devices for colour picture display, e.g. using electronic spatial light modulators [ESLM] using two-dimensional electronic spatial light modulators
    • H04N9/3105—Projection devices for colour picture display, e.g. using electronic spatial light modulators [ESLM] using two-dimensional electronic spatial light modulators for displaying all colours simultaneously, e.g. by using two or more electronic spatial light modulators
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N9/00—Details of colour television systems
    • H04N9/12—Picture reproducers
    • H04N9/31—Projection devices for colour picture display, e.g. using electronic spatial light modulators [ESLM]
    • H04N9/3141—Constructional details thereof
    • H04N9/317—Convergence or focusing systems

Definitions

  • the present invention relates to a lens alignment adjusting device that adjusts the inclination of a projection lens in a projector, and a projector including the same.
  • a projector In a projector, light emitted from an illumination optical system is modulated using a modulation optical system such as a DMD (Digital Micromirror Device) or a liquid crystal panel, and the modulated light is enlarged and projected onto a screen outside the apparatus by a projection lens.
  • the projection lens can be configured to be attachable to and detachable from a projector incorporating the illumination optical system or the modulation optical system. By changing the projection lens, it is possible to cope with a wide range of projection distances depending on applications. .
  • a bayonet type or a spigot type is known as a mechanism for attaching the projection lens to the projector.
  • the flange portion provided on the lens unit side is pressed against the lens mount main body provided on the projector side, and the lens unit is held in a fixed posture with respect to the lens mount main body.
  • an angle adjustment plate is provided for the lens mount body, and the flange portion of the lens unit is in pressure contact with the angle adjustment plate.
  • a plurality of angle adjusting screws are screwed onto the angle adjusting plate, and the tip ends of the angle adjusting screws are in contact with the lens mount main body.
  • the present invention has been made in view of such a problem, and an object of the present invention is to keep the distance between the lens unit and the projector on the optical axis constant, while maintaining the light of the lens unit with respect to the optical axis of the projector body.
  • An object of the present invention is to provide a lens alignment adjusting device capable of arbitrarily correcting the angular accuracy of an axis.
  • the present invention is a lens alignment adjustment device that is provided in a projector and holds a projection lens and can adjust the inclination of the optical axis of the projection lens with respect to the projector, and is in a predetermined posture with respect to the projector.
  • the lens fixing plate is slidably coupled to the base plate via a first restricting axis orthogonal to the optical axis of the projection lens, and an inclination angle of the lens fixing plate around the first restricting axis with respect to the base plate is determined.
  • First adjusting means for setting is provided.
  • the present invention it is possible to arbitrarily correct the angular accuracy of the optical axis of the projection lens with respect to the optical axis of the projector while keeping the distance between the projection lens and the projector main body on the optical axis constant at all times. is there.
  • FIG. 1 is a schematic diagram showing a schematic configuration of a projector equipped with a lens alignment adjusting device according to the present invention.
  • the projector modulates a light beam emitted from a light source in accordance with image information and projects it on a screen or the like.
  • the projector 1 includes an optical unit 3 having an exterior housing 2 constituting an exterior, a control unit (not shown), and a light source device 31, and a projection lens 36 is fixed to the optical unit 3.
  • a power supply device that supplies power to the light source device 31 and the control unit, a cooling device that cools the optical unit 3, and the like are further arranged inside the exterior housing 2.
  • the projector 1 includes a lens shift adjustment device 5 that moves the projection lens 36 and a lens alignment adjustment device 6 that corrects the angle accuracy of the optical axis of the projection lens 36, and moves an image projected on a screen or the like. It is configured to be able to.
  • the direction in which the light beam is emitted from the projection lens 36 is referred to as the front side
  • the upper side in the installation posture where the projector 1 is installed on the desk or the like is referred to as the upper side.
  • the exterior housing 2 is made of synthetic resin and is formed so that the tip of the projection lens 36 is exposed.
  • the exterior housing 2 is provided with an intake port for taking in outside air, an exhaust port for exhausting warm air inside the exterior housing 2 to the outside, and the like.
  • the control unit includes a CPU (Central Processing Unit), a ROM (Read Only Memory), a RAM (Random Access Memory), and the like, and functions as a computer, and controls the operation of the projector 1, for example, image projection. Perform related control.
  • a CPU Central Processing Unit
  • ROM Read Only Memory
  • RAM Random Access Memory
  • the optical unit 3 optically processes and projects the light beam emitted from the light source device 31 under the control of the control unit.
  • the optical unit 3 includes an integrator illumination optical system 32, a color separation optical system 33, a relay optical system 34, an optical device 4, a head body 37, a projection lens 36, a lens in addition to the light source device 31.
  • a shift adjusting device 5, a lens alignment adjusting device 6, and an optical component casing 38 for arranging these members at predetermined positions on the optical path are provided.
  • the optical unit 3 is formed in a substantially L shape in plan view as shown in FIG. 1, and the light source device 31 is detachably disposed at one end, and the projection lens 36 is disposed at the other end.
  • the direction in which the light beam is emitted from the light source device 31 is described as + X direction
  • the direction in which light projected from the projector 1 is emitted is defined as + Y direction (forward direction)
  • the upward direction is described as + Z direction.
  • the ⁇ X direction is the left-right direction and the ⁇ Z direction is the up-down direction.
  • the light source device 31 includes a discharge-type light source 311 made of an ultra-high pressure mercury lamp, a metal halide lamp, or the like, a reflector 312, and the like. And inject.
  • the integrator illumination optical system 32 includes a first lens array 321, a second lens array 322, a polarization conversion element 323, and a superimposing lens 324, and a light beam emitted from the light source device 31 is placed on the surface of a liquid crystal light valve 43 to be described later. It is configured so as to be irradiated substantially uniformly and effectively.
  • the color separation optical system 33 includes two dichroic mirrors 331 and 332, and a reflection mirror 333.
  • a light beam emitted from the integrator illumination optical system 32 is converted into red light (hereinafter referred to as “R light”) and green light (hereinafter referred to as “R light”). It has a function of separating into three colors of light, “G light” and blue light (hereinafter referred to as “B light”).
  • the relay optical system 34 includes an incident side lens 341, a relay lens 343, and reflection mirrors 342 and 344, and has a function of guiding the R light separated by the color separation optical system 33 to the liquid crystal light valve 43 for R light.
  • the optical unit 3 has a configuration in which the relay optical system 34 guides the R light.
  • the configuration is not limited thereto, and for example, a configuration in which the B light is guided may be employed.
  • the optical device 4 is an electro-optical device 40 provided for each color light (the electro-optical device for R light is 40R, the electro-optical device for G light is 40G, and the electro-optical device for B light is 40B). And a cross dichroic prism 41 as a color synthesizing optical device.
  • Each electro-optical device 40 includes an incident-side polarizing plate 42, a liquid crystal light valve 43 serving as a light modulation device, and an emission-side polarizing plate 44, and modulates each color light according to image information.
  • the cross dichroic prism 41 has a substantially square shape in plan view in which four right angle prisms are bonded together, and two dielectric multilayer films are formed at the interface where the right angle prisms are bonded together.
  • the dielectric multilayer film reflects the color light modulated by the electro-optical devices 40R and 40B, transmits the color light modulated by the electro-optical device 40G, and synthesizes each color light. .
  • the projection lens 36 has a plurality of lenses (not shown) arranged along the optical axis 36j, and enlarges and projects the light synthesized by the cross dichroic prism 41 on the screen.
  • the head body 37 supports the lens shift mechanism 5 with respect to the optical component casing 38, and the projection lens 36 held by the lens shift mechanism 5 is relative to the optical component casing 38. It can move in the left-right direction and the up-down direction
  • the lens alignment adjusting device 6 includes a mount mechanism for mounting the projection lens 36 on the optical unit 3, and the optical axis of the projection lens 36 mounted on the optical unit 3 is the optical device of the optical unit 3. This is used to adjust the inclination when the inclination is 4 with respect to the optical axis.
  • the lens alignment adjustment device 6 may not include the mount mechanism, and the projection lens 36 may be fixedly provided to the lens alignment adjustment device 6.
  • the lens alignment adjusting device 6 includes a base plate held in a predetermined posture with respect to the optical unit 3 and a lens fixing plate having a mount mechanism to which the projection lens 36 is fixed.
  • the lens fixing plate is swingably coupled to the base plate via a first restriction shaft.
  • the first restriction axis is orthogonal to the optical axis 36j of the projection lens 36 held on the lens fixing plate.
  • orthogonal means that when the central axis of the first restriction axis is virtually extended, the central axis intersects the optical axis at a right angle.
  • the apparatus is provided with a first adjusting means for setting an inclination angle of the lens fixing plate around the first regulating axis with respect to the base plate.
  • the lens fixing plate is swingable about the first restriction axis, and an inclination angle of the lens fixing plate with respect to the base plate can be freely changed around the first restriction axis. Is possible.
  • an inclination angle of the lens fixing plate with respect to the base plate can be set by the first adjusting means.
  • the first restricting axis is orthogonal to the optical axis 36j of the projection lens 36, even if the inclination angle of the lens fixing plate is changed, the first regulating axis is different from the base plate on the optical axis 36j of the projection lens.
  • the distance from the lens fixing plate does not change. Therefore, according to the lens alignment adjusting device, the optical axis 36j of the projection lens 36 with respect to the optical axis of the optical device 4 is always kept constant while keeping the distance between the projection lens 36 and the optical device 4 on the optical axis constant. It is possible to arbitrarily correct the angle accuracy.
  • the optical axis and the first restriction axis may be provided. It is also possible to provide a second regulating axis that is orthogonal to both. With this configuration, the angular accuracy between the optical axis of the optical device 4 and the optical axis 36j of the projection lens 36 can be corrected more precisely.
  • FIG. 2 is a schematic view showing an example of a lens alignment adjusting device to which the present invention is applied.
  • the lens alignment adjusting device 6 functions as an attachment portion for mounting the projection lens 36 to the optical unit 3 and is provided in the optical unit 3 for use.
  • the lens alignment device 6 includes a base plate 62, a lens fixing plate 63 to which the projection lens 36 is fixed and an inclination angle with respect to the base plate 62 can be freely adjusted, and between the base plate 62 and the lens fixing plate 63.
  • the intermediate plate 64 is interposed.
  • the base plate 62, the lens fixing plate 63, and the intermediate plate 64 are all formed in a substantially rectangular shape when viewed from the light exit direction side of the light beam from the projection lens 36 described later.
  • the base plate 62 is held by the optical component casing 38 of the optical unit 3 via a lens shift adjusting device 5 indicated by a one-dot chain line in FIG.
  • the lens shift adjusting device 5 can freely move the base plate 62 in the horizontal direction and the vertical direction orthogonal to each other, and the optical axis 36j of the projection lens 36 mounted on the lens fixing plate 63 is The optical axis O of the optical device 4 is moved in the horizontal direction and / or the vertical direction without changing its inclination, and the image projected through the projection lens 36 is moved in the horizontal direction and / or the vertical direction.
  • the projection lens 36 includes a cylindrical front part 360, a rear part 361 having a smaller diameter than the front part 360, and a flange part 362 provided between the front part 360 and the rear part 361. ing.
  • the lens fixing plate 63, the intermediate plate 64, and the base plate 62 are provided with central openings 630, 640, and 620, respectively, and the rear portion 361 is provided from the lens fixing plate 63 side with these central openings 630, 640. , And 620.
  • the light beam emitted from the optical device 4 enters the projection lens 36 through the rear portion 361.
  • the projection lens 36 is held on the lens fixing plate 63 by a mounting mechanism (not shown). At this time, the flange portion 362 comes into close contact with the lens fixing plate 63 by the action of the mount mechanism, and the projection lens 36 is held with the lens fixing plate 63 as a reference.
  • the intermediate plate 64 is coupled to the base plate 62 via a first center pin 11 as the first regulating shaft, and is swingable with respect to the base plate 62 about the first center pin 11. Is arranged.
  • the first center pin 11 is disposed on an axis V orthogonal to the optical axis 36j of the projection lens 36 held in a predetermined posture on the lens fixing plate 63. This axis V coincides with the Z direction. For this reason, the intermediate plate 64 swings about the first center pin 11 to freely change the inclination angle in the left-right direction ( ⁇ X direction in FIG. 2) with respect to the base plate 62. ing.
  • the intermediate plate 64 is coupled to the lens fixing plate 63 via a second center pin 12 serving as a second restricting shaft, and swings with respect to the lens fixing plate 63 about the second center pin 12. It is arranged freely.
  • the second center pin 12 is disposed on an axis H orthogonal to the optical axis 36j of the projection lens 36 held in a predetermined posture on the lens fixing plate 63. This axis H coincides with the X direction. Therefore, the lens fixing plate 63 swings around the second center pin 12 to freely change the tilt angle in the vertical direction ( ⁇ Z direction in FIG. 2) with respect to the intermediate plate 64. It has become.
  • FIG. 3 is a perspective view showing one surface of the base plate 62 facing the intermediate plate 64.
  • a pair of support members 621 are fixed to the base plate 62 on both sides of the central opening 620.
  • a pair of support members 641a are also fixed to one surface of the intermediate plate 64 facing the base plate 62 on both sides of the central opening 640 (see FIG. 2).
  • the first center pin 11 passes through the support member 621 of the base plate 62 and the support member 641a of the intermediate plate 64 so as to overlap the support member 641a of the intermediate plate 64 and the support member 621 of the base plate 62.
  • the base plate 62 and the intermediate plate 64 are coupled in a swingable manner.
  • a predetermined space is provided between the base plate 62 and the support member 641a of the intermediate plate 64, and between the intermediate plate 64 and the support member 621 of the base plate 62, and the first center pin 11 is provided.
  • the center plate 64 is not hindered from swinging.
  • FIG. 4 is a view of the lens alignment adjusting device 6 observed from below in the + Z direction.
  • a pair of support members 631 are fixed to the lens fixing plate 63 on both sides of the central opening 630.
  • a pair of support members 641b are also fixed to one surface of the intermediate plate 64 facing the lens fixing plate 63 with the central opening 640 interposed therebetween.
  • the second center pin 12 overlaps the outside of the support member 631 of the lens fixing plate 63 and the support member 641b of the intermediate plate 64, and the second center pin 12 is supported by the support member 631 of the lens fixing plate 63 and the support member 641b of the intermediate plate 64.
  • the lens fixing plate 63 and the intermediate plate 64 are pivotably coupled to each other.
  • a predetermined space is provided between the intermediate plate 64 and the support member 631 of the lens fixing plate 63, and between the lens fixing plate 63 and the support member 641b of the intermediate plate 64.
  • the swing of the lens fixing plate 63 around the two center pins 12 is not hindered.
  • the intermediate plate 64 can change the inclination angle in the left-right direction with respect to the base plate 62 held in a predetermined posture by the lens shift adjusting device 5, and the lens can be changed with respect to the intermediate plate 64.
  • the fixed plate 63 can change the inclination angle in the vertical direction.
  • the lens fixed plate 63 can arbitrarily change the horizontal and vertical inclination angles with respect to the base plate 62. That is, the projection lens 36 is held in a predetermined posture with respect to the lens fixing plate 63 by using the mounting mechanism described above, so that the optical axis 36j of the projection lens 36 is free with respect to the optical axis O of the optical device 4. It is possible to incline.
  • the first adjusting means for setting the inclination angle of the intermediate plate 64 with respect to the base plate 62 will be described.
  • the first adjusting means is disposed in a space between the base plate 62 and the intermediate plate 64, and a coil spring 622 as an urging member and the urging force of the coil spring 622 are used.
  • a first interval changing member 13 that changes the distance between the base plate 62 and the intermediate plate 64 is provided.
  • the first interval changing member 13 includes a cam plate 624 that advances and retreats on the base plate 62 according to the fastening amount of the adjusting screw 623, and a pressure receiving member that is fixed to the intermediate plate 64 and contacts the cam plate 624. 642.
  • FIG. 3 shows the cam plate 624 attached to the base plate 62.
  • the cam plate 624 is elongated in the Z direction and is fixed along the side of the base plate 62.
  • the contact surface of the cam plate 624 with the pressure receiving member 642 is an inclined surface inclined by a predetermined angle with respect to the base plate 62, and the cross-sectional shape of the cam plate 624 cut along the XY plane forms a substantially wedge shape.
  • a pair of elongated holes along the X direction is formed at both ends in the longitudinal direction of the cam plate 624, and the cam plate is held on the base plate 62 by two bolts passing through the pair of elongated holes. Yes. Accordingly, the cam plate 624 can freely adjust the fixing position with respect to the base plate 62 along the ⁇ X directions.
  • a screw mounting portion 625 is fixed to the base plate 62, and an adjustment screw 623 is screwed to the screw mounting portion 625.
  • the tip of the adjustment screw 623 is in contact with the cam plate 624, and when the tightening amount of the adjustment screw 623 with respect to the screw attachment portion 625 is increased, the cam plate 624 advances toward the first center pin 11. .
  • the pressure receiving member 642 has substantially the same shape as the cam plate 624, but the intermediate plate is opposed to the cam plate 624 so that the cam plate 624 and the inclined surfaces are in contact with each other. 64 is fixed. Unlike the cam plate 624, the pressure receiving member 642 is fixed at a fixed position on the intermediate plate 64.
  • the coil spring 622 is disposed between the base plate 62 and the intermediate plate 64 and is located on the opposite side to the first interval changing member 13 with the first center pin 11 interposed therebetween. A pair of the coil springs 622 is arranged along the Z direction. For this reason, the intermediate plate 64 rotates around the first center pin 11 by the biasing force of the coil spring 622, and the cam plate 624 and the pressure receiving portion 642 of the interval changing member 13 are always in pressure contact.
  • the cam plate 624 advances toward the first center pin 11, and the coil The pressure receiving member 642 is pressed against the urging force of the spring 622. Accordingly, the intermediate plate 64 is inclined with respect to the base plate 62 in the direction in which the coil spring 622 is compressed. Further, when the tightening amount of the adjustment screw 623 with respect to the screw mounting portion 625 is decreased, the pressure receiving member 642 presses the cam plate 624 by the urging force of the coil spring 622, so that the cam plate 624 is the first center. Treatment in the opposite direction to the pin 11. Accordingly, the intermediate plate 64 is inclined with respect to the base plate 62 in a direction in which the coil spring 622 extends.
  • the coil spring 622 is disposed at a position away from the first center pin 11, in other words, in the vicinity of the outer edge portions of the base plate 62 and the intermediate plate 64. It is preferable.
  • the screw mounting portion 625 and the adjustment screw 623 are preferably provided in the vicinity of the outer edge portion of the base plate 62 in order to improve the operability for the user.
  • second adjusting means having the same configuration as the first adjusting means is provided between the intermediate plate 64 and the lens fixing plate 63.
  • the second adjusting means is disposed in a space between the intermediate plate 64 and the lens fixing plate 63, and the coil spring 632 as an urging member and the intermediate force against the urging force of the coil spring 632.
  • a second interval changing member 14 for changing the distance between the plate 64 and the lens fixing plate 63.
  • the second interval changing member 14 is fixed to the cam plate 643 that advances and retreats on the intermediate plate 64 according to the fastening amount of the adjusting screw 645, and the lens fixing plate 63, and contacts the cam plate 643.
  • a pressure receiving member 633 Further, the adjustment screw 645 is screwed into a screw mounting portion 644 fixed to the intermediate plate.
  • the cam plate 643 advances toward the second center pin 12, and the coil The pressure receiving member 633 is pressed against the urging force of the spring 632. Accordingly, the lens fixing plate 63 is inclined with respect to the intermediate plate 64 in a direction in which the coil spring 632 is compressed. Further, when the tightening amount of the adjustment screw 645 with respect to the screw mounting portion 644 is decreased, the pressure receiving member 633 presses the cam plate 643 by the urging force of the coil spring 632, so that the cam plate 643 is in the second center. Treatment in the opposite direction to the pin 12. Accordingly, the lens fixing plate 63 is inclined with respect to the intermediate plate 64 in a direction in which the coil spring 632 extends.
  • the coil spring 632 is arranged on the + Z direction side as shown in FIG. This is because, when the coil spring 632 is arranged in the ⁇ Z direction, a load due to the weight of the projection lens 36 is applied, so that the lens fixing is possible even if the tightening amount of the adjustment screw 645 with respect to the screw mounting portion 644 is reduced. This is because the plate 63 is not easily inclined with respect to the intermediate plate 64 in the direction in which the coil spring 632 extends. In other words, by arranging the coil spring 632 on the + Z direction side, the lens fixing plate 63 can be smoothly moved with respect to the intermediate plate 64.
  • first adjusting means provided between the base plate 62 and the intermediate plate 64
  • second adjusting means provided between the intermediate plate 64 and the lens fixing plate 63.
  • the lens alignment adjusting device 6 may be configured by exchanging the arrangement of the first center pin 11 and the arrangement of the second center pin 12 shown in FIGS.
  • the second adjusting means provided between the base plate 62 and the intermediate plate 64 adjusts the vertical inclination of the optical axis 36j of the projection lens 36 with respect to the optical axis O of the optical device 4, and the intermediate plate 64 and the lens.
  • the same effect can be obtained by adjusting the inclination in the left-right direction with the first adjusting means provided between the fixing plate 63 and the fixing plate 63.
  • the pair of support members 621 and the cam plate 624 are arranged along the side of the base plate 62 on the surface of the base plate 62 facing the intermediate plate 64. Yes. Further, the pair of support members 631 and the pressure receiving member 633 are arranged along the side of the lens fixing plate 63 on the surface of the lens fixing plate 63 facing the intermediate plate 64. Further, the pair of support members 641a and the pressure receiving member 642 are disposed on the surface of the intermediate plate 64 facing the base plate 62, while the pair of support members 641a and the pressure receiving member 642 are disposed on the surface of the intermediate plate 64 facing the lens fixing plate. The support member 641b and the cam plate 643 are disposed.
  • the support members 621, 641 a, 641 b, 631, the sides of the base plate 62, the intermediate plate 64, and the lens fixing plate 63 formed in a substantially rectangular shape
  • the cam plates 624 and 643 and the pressure receiving members 642 and 633 are arranged, and each of these members is formed in a rod shape having a substantially rectangular cross section or a substantially wedge shape.
  • the base plate 62, the intermediate plate 64, and the lens fixing plate 63 are set to have small thicknesses, the support members 621, 641a, 641b, 631, the cam plates 624, 643, and the pressure receiving member. It is possible to suppress the deformation of these plates 62, 63, 64 by utilizing the rigidity of 642,633. Thereby, weight reduction of the lens alignment adjustment apparatus 6 is achieved.
  • the support members 621, 641a, 641b, 631 and the pressure receiving members 642, 633 are integrally formed with the base plate 62, the intermediate plate 64, and the lens fixing plate 63 using a manufacturing method such as die casting. There is no problem.
  • the base plate 62 is held by the optical component casing 38 of the projector 1 via the lens shift adjusting device 6, and the inclination angle of the intermediate plate 64 in the left-right direction can be freely adjusted with respect to the base plate 62, Further, the inclination angle in the vertical direction of the lens fixing plate 63 with respect to the intermediate plate 64 can be freely adjusted. As a result, the inclination of the projection lens 36 held in the lens fixing plate 63 in the horizontal direction and the vertical direction The angle can be freely adjusted with respect to the optical component casing 38.
  • the base plate 62 and the intermediate plate 64 are swingably coupled via the first center pin 11 orthogonal to the optical axis 36j of the projection lens 36, and the inclination angle of the intermediate plate 64 with respect to the base plate 62 is changed. Even so, the distance between the plates 62 and 64 does not change on the optical axis 36j.
  • the intermediate plate 64 and the lens fixing plate 63 are slidably coupled via the optical axis 36 j of the projection lens 36 and the second center pin 12 orthogonal to the first center pin 11, and Even if the inclination angle of the intermediate plate 64 is changed, the distance between the plates 63 and 64 does not change on the optical axis 36j.
  • this lens alignment adjusting device 6 even if the inclination angle of the optical axis 36j of the projection lens 36 is changed in two directions of the left and right direction and the up and down direction, the optical device 4 of the projector 1 on the optical axis 36j.
  • the angle accuracy of the projection lens 36 can be arbitrarily corrected while the path length of the modulated projection light is kept constant.

Abstract

This lens alignment adjustment device makes it possible to arbitrarily correct the accuracy of the angle between the optical axes of a projector main body and a lens unit while keeping the distance between the lens unit and the projector along an optical axis constant. Provided is a lens alignment adjustment device (6) that is provided in a projector (1), holds a projection lens (36) , and is capable of adjusting the inclination of an optical axis (36j) of the projection lens relative to the projector, said lens alignment adjustment device including a base plate (62) held in a prescribed orientation relative to the projector, and a lens fixing plate (63) to which the projection lens is secured, wherein: the lens fixing plate (63) is pivotally coupled to the base plate (62) via a first center pin (11) orthogonal to the optical axis of the projection lens (36); and the lens alignment adjustment device (6) is provided with a first adjustment means for setting the inclination angle of the lens fixing plate about the first center pin (11) relative to the base plate (62).

Description

レンズアライメント調整装置及びこれを備えたプロジェクターLens alignment adjusting device and projector provided with the same
　本発明は、プロジェクターにおける投写レンズの傾きを調整するレンズアライメント調整装置及びこれを備えたプロジェクターに関する。 The present invention relates to a lens alignment adjusting device that adjusts the inclination of a projection lens in a projector, and a projector including the same.
　プロジェクターでは、照明光学系が射出した光をＤＭＤ（Digital Micromirror Device）や液晶パネル等の変調光学系を用いて変調し、変調された光を投写レンズによって装置外のスクリーン上に拡大投影している。前記投写レンズは前記照明光学系や変調光学系を内蔵したプロジェクターに対して着脱可能に構成することができ、投写レンズを交換することで、用途によって異なる投写距離に幅広く対応することが可能である。 In a projector, light emitted from an illumination optical system is modulated using a modulation optical system such as a DMD (Digital Micromirror Device) or a liquid crystal panel, and the modulated light is enlarged and projected onto a screen outside the apparatus by a projection lens. . The projection lens can be configured to be attachable to and detachable from a projector incorporating the illumination optical system or the modulation optical system. By changing the projection lens, it is possible to cope with a wide range of projection distances depending on applications. .
　前記投写レンズをプロジェクターに装着する機構としては、バヨネット式やスピゴット式といったものが知られている。いずれの方式においても、前記レンズユニット側に設けられたフランジ部を前記プロジェクター側に設けられたレンズマウント本体に押し付け、前記レンズマウント本体に対してレンズユニットを一定の姿勢で保持している。 As a mechanism for attaching the projection lens to the projector, a bayonet type or a spigot type is known. In either method, the flange portion provided on the lens unit side is pressed against the lens mount main body provided on the projector side, and the lens unit is held in a fixed posture with respect to the lens mount main body.
　また、特許文献１に開示されるレンズ装着装置では、前記レンズマウント本体に対して角度調整プレートが設けられており、前記レンズユニットのフランジ部は当該角度調整プレートに圧接するようになっている。この角度調整プレートには複数の角度調整ネジが螺合すると共に、当該角度調整ネジの先端は前記レンズマウント本体に突き当たっており、各々の角度調整ネジの螺合量を変更することで、前記レンズマウント本体に対する角度調整プレートの配設角度を変化させることができる。これにより、前記レンズユニットは角度調整プレートを基準とした姿勢でプロジェクターに保持され、前記プロジェクターの光軸に対する当該レンズユニットの光軸の角度精度を任意に補正することが可能となっていた。 Further, in the lens mounting device disclosed in Patent Document 1, an angle adjustment plate is provided for the lens mount body, and the flange portion of the lens unit is in pressure contact with the angle adjustment plate. A plurality of angle adjusting screws are screwed onto the angle adjusting plate, and the tip ends of the angle adjusting screws are in contact with the lens mount main body. By changing the screwing amount of each angle adjusting screw, the lens is adjusted. The arrangement angle of the angle adjustment plate with respect to the mount body can be changed. Accordingly, the lens unit is held by the projector in a posture with respect to the angle adjustment plate, and the angle accuracy of the optical axis of the lens unit with respect to the optical axis of the projector can be arbitrarily corrected.
特開２０１０－２７６８９５JP 2010-276895 A
　しかし、特許文献１に示す従来のレンズ装着装置では、複数の角度調整ネジのうち、一の角度調整ネジの螺合量を変化させると、他の角度調整ネジを支点として前記レンズマウント本体に対する前記角度調整プレートの傾きが変化するので、各角度調整ネジの螺合量を変更するたびに、光軸上におけるレンズユニットとレンズマウント本体との距離が変化してしまうといった課題があった。 However, in the conventional lens mounting device shown in Patent Document 1, when the screwing amount of one angle adjustment screw among a plurality of angle adjustment screws is changed, the other angle adjustment screw is used as a fulcrum for the lens mount body. Since the inclination of the angle adjustment plate changes, there is a problem that the distance between the lens unit and the lens mount body on the optical axis changes every time the screwing amount of each angle adjustment screw is changed.
　本発明はこのような課題に鑑みなされたものであり、その目的は、光軸上におけるレンズユニットとプロジェクターとの距離を常に一定に保持しつつ、前記プロジェクター本体の光軸に対する当該レンズユニットの光軸の角度精度を任意に補正することが可能なレンズアライメント調整装置を提供することにある。 The present invention has been made in view of such a problem, and an object of the present invention is to keep the distance between the lens unit and the projector on the optical axis constant, while maintaining the light of the lens unit with respect to the optical axis of the projector body. An object of the present invention is to provide a lens alignment adjusting device capable of arbitrarily correcting the angular accuracy of an axis.
　すなわち、本発明は、プロジェクターに設けられて投写レンズを保持すると共に、当該投写レンズの前記プロジェクターに対する光軸の傾きを調整可能なレンズアライメント調整装置であって、前記プロジェクターに対して所定の姿勢で保持されたベースプレートと、前記投写レンズが固定されるレンズ固定プレートと、を有している。前記レンズ固定プレートは前記投写レンズの光軸と直交する第一規制軸を介して前記ベースプレートと揺動自在に結合され、前記ベースプレートに対する前記第一規制軸周りでの前記レンズ固定プレートの傾斜角度を設定する第一調整手段が設けられている。 That is, the present invention is a lens alignment adjustment device that is provided in a projector and holds a projection lens and can adjust the inclination of the optical axis of the projection lens with respect to the projector, and is in a predetermined posture with respect to the projector. A holding base plate; and a lens fixing plate to which the projection lens is fixed. The lens fixing plate is slidably coupled to the base plate via a first restricting axis orthogonal to the optical axis of the projection lens, and an inclination angle of the lens fixing plate around the first restricting axis with respect to the base plate is determined. First adjusting means for setting is provided.
　本発明によれば、光軸上における投写レンズとプロジェクター本体との距離を常に一定に保持したまま、前記プロジェクターの光軸に対する当該投写レンズの光軸の角度精度を任意に補正することが可能である。 According to the present invention, it is possible to arbitrarily correct the angular accuracy of the optical axis of the projection lens with respect to the optical axis of the projector while keeping the distance between the projection lens and the projector main body on the optical axis constant at all times. is there.
プロジェクターの概略構成を示す模式図である。It is a schematic diagram which shows schematic structure of a projector. 本発明に係るレンズアライメント調整装置の実施形態の一例を示す斜視図である。It is a perspective view which shows an example of embodiment of the lens alignment adjustment apparatus which concerns on this invention. ベースプレートの一例を示す斜視図である。It is a perspective view which shows an example of a base plate. ベースプレート、中間プレート及びレンズ固定プレートの三者間の構造を示す側面図である。It is a side view which shows the structure between the three of a base plate, an intermediate | middle plate, and a lens fixing plate.
　以下、添付図面を参照しながら本発明を適用したレンズアライメント調整装置を詳細に説明する。 Hereinafter, a lens alignment adjustment apparatus to which the present invention is applied will be described in detail with reference to the accompanying drawings.
　図１は本発明に係るレンズアライメント調整装置を搭載するプロジェクターの概略構成を示す模式図であり、前記プロジェクターは光源から射出された光束を画像情報に応じて変調してスクリーン等に拡大投写する。 FIG. 1 is a schematic diagram showing a schematic configuration of a projector equipped with a lens alignment adjusting device according to the present invention. The projector modulates a light beam emitted from a light source in accordance with image information and projects it on a screen or the like.
　前記プロジェクター１は、図１に示すように、外装を構成する外装筐体２、制御部（図示省略）及び光源装置３１を有する光学ユニット３を備え、前記光学ユニット３には投写レンズ３６が固定されている。なお、図示は省略するが、外装筐体２の内部には、さらに、光源装置３１や制御部に電力を供給する電源装置、光学ユニット３等を冷却する冷却装置等が配置されている。 As shown in FIG. 1, the projector 1 includes an optical unit 3 having an exterior housing 2 constituting an exterior, a control unit (not shown), and a light source device 31, and a projection lens 36 is fixed to the optical unit 3. Has been. Although not shown, a power supply device that supplies power to the light source device 31 and the control unit, a cooling device that cools the optical unit 3, and the like are further arranged inside the exterior housing 2.
　本実施形態のプロジェクター１は、投写レンズ３６を移動させるレンズシフト調整装置５、及び投写レンズ３６の光軸の角度精度を補正するレンズアライメント調整装置６を備え、スクリーン等に投写された画像を移動できるように構成されている。なお、以下では、説明の便宜上、投写レンズ３６から光束が射出される方向を前側、プロジェクター１が机上等に据え置かれた据置姿勢における上方を上側として記載する。 The projector 1 according to the present embodiment includes a lens shift adjustment device 5 that moves the projection lens 36 and a lens alignment adjustment device 6 that corrects the angle accuracy of the optical axis of the projection lens 36, and moves an image projected on a screen or the like. It is configured to be able to. In the following, for convenience of explanation, the direction in which the light beam is emitted from the projection lens 36 is referred to as the front side, and the upper side in the installation posture where the projector 1 is installed on the desk or the like is referred to as the upper side.
　前記外装筐体２は合成樹脂製であり、投写レンズ３６の先端部が露出するように形成されている。また、外装筐体２には外気を取り込むための吸気口、及び外装筐体２内部の温まった空気を外部に排気する排気口等が設けられている。 The exterior housing 2 is made of synthetic resin and is formed so that the tip of the projection lens 36 is exposed. The exterior housing 2 is provided with an intake port for taking in outside air, an exhaust port for exhausting warm air inside the exterior housing 2 to the outside, and the like.
　前記制御部は、ＣＰＵ（Central Processing Unit）やＲＯＭ（Read Only Memory）、ＲＡＭ（Random Access Memory）等を備え、コンピューターとして機能するものであり、プロジェクター１の動作の制御、例えば、画像の投写に関わる制御等を行う。 The control unit includes a CPU (Central Processing Unit), a ROM (Read Only Memory), a RAM (Random Access Memory), and the like, and functions as a computer, and controls the operation of the projector 1, for example, image projection. Perform related control.
　前記光学ユニット３は、前記制御部による制御の下、前記光源装置３１から射出された光束を光学的に処理して投写する。前記光学ユニット３は、図１に示すように、光源装置３１に加えて、インテグレーター照明光学系３２、色分離光学系３３、リレー光学系３４、光学装置４、ヘッド体３７、投写レンズ３６、レンズシフト調整装置５、レンズアライメント調整装置６、およびこれらの部材を光路上の所定位置に配置する光学部品用筐体３８を備えている。 The optical unit 3 optically processes and projects the light beam emitted from the light source device 31 under the control of the control unit. As shown in FIG. 1, the optical unit 3 includes an integrator illumination optical system 32, a color separation optical system 33, a relay optical system 34, an optical device 4, a head body 37, a projection lens 36, a lens in addition to the light source device 31. A shift adjusting device 5, a lens alignment adjusting device 6, and an optical component casing 38 for arranging these members at predetermined positions on the optical path are provided.
　前記光学ユニット３は、図１に示すように平面視略Ｌ字状に形成され、一方の端部に光源装置３１が着脱可能に配置され、他方の端部に投写レンズ３６が配置される。なお、以下では、説明の便宜上、光源装置３１から光束が射出される方向を＋Ｘ方向、プロジェクター１から投写される光が射出される方向を＋Ｙ方向（前方向）、上方向を＋Ｚ方向として記載する。また、±Ｘ方向を左右方向、±Ｚ方向を上下方向とする。 The optical unit 3 is formed in a substantially L shape in plan view as shown in FIG. 1, and the light source device 31 is detachably disposed at one end, and the projection lens 36 is disposed at the other end. In the following, for convenience of explanation, the direction in which the light beam is emitted from the light source device 31 is described as + X direction, the direction in which light projected from the projector 1 is emitted is defined as + Y direction (forward direction), and the upward direction is described as + Z direction. To do. The ± X direction is the left-right direction and the ± Z direction is the up-down direction.
　前記光源装置３１は、超高圧水銀ランプやメタルハライドランプ等からなる放電型の光源３１１およびリフレクター３１２等を備え、光源３１１から射出された光束をリフレクター３１２にて反射し、インテグレーター照明光学系３２に向けて射出する。 The light source device 31 includes a discharge-type light source 311 made of an ultra-high pressure mercury lamp, a metal halide lamp, or the like, a reflector 312, and the like. And inject.
　前記インテグレーター照明光学系３２は、第１レンズアレイ３２１、第２レンズアレイ３２２、偏光変換素子３２３、および重畳レンズ３２４を備え、光源装置３１から射出された光束が後述する液晶ライトバルブ４３の表面に略均一に照射されるように、また有効利用されるように構成されている。 The integrator illumination optical system 32 includes a first lens array 321, a second lens array 322, a polarization conversion element 323, and a superimposing lens 324, and a light beam emitted from the light source device 31 is placed on the surface of a liquid crystal light valve 43 to be described later. It is configured so as to be irradiated substantially uniformly and effectively.
　前記色分離光学系３３は、２枚のダイクロイックミラー３３１，３３２、および反射ミラー３３３を備え、インテグレーター照明光学系３２から射出された光束を赤色光（以下「Ｒ光」という）、緑色光（以下「Ｇ光」という）、青色光（以下「Ｂ光」という）の３色の色光に分離する機能を有する。 The color separation optical system 33 includes two dichroic mirrors 331 and 332, and a reflection mirror 333. A light beam emitted from the integrator illumination optical system 32 is converted into red light (hereinafter referred to as “R light”) and green light (hereinafter referred to as “R light”). It has a function of separating into three colors of light, “G light” and blue light (hereinafter referred to as “B light”).
　前記リレー光学系３４は、入射側レンズ３４１、リレーレンズ３４３、および反射ミラー３４２，３４４を備え、前記色分離光学系３３で分離されたＲ光をＲ光用の液晶ライトバルブ４３まで導く機能を有する。なお、前記光学ユニット３は、前記リレー光学系３４がＲ光を導く構成としているが、これに限らず、例えば、Ｂ光を導く構成としてもよい。 The relay optical system 34 includes an incident side lens 341, a relay lens 343, and reflection mirrors 342 and 344, and has a function of guiding the R light separated by the color separation optical system 33 to the liquid crystal light valve 43 for R light. Have. The optical unit 3 has a configuration in which the relay optical system 34 guides the R light. However, the configuration is not limited thereto, and for example, a configuration in which the B light is guided may be employed.
　前記光学装置４は、各色光用に設けられた電気光学装置４０（Ｒ光用の電気光学装置を４０Ｒ、Ｇ光用の電気光学装置を４０Ｇ、Ｂ光用の電気光学装置を４０Ｂとする）、および色合成光学装置としてのクロスダイクロイックプリズム４１を備えている。各電気光学装置４０は、入射側偏光板４２、光変調装置としての液晶ライトバルブ４３、および射出側偏光板４４を備え、各色光を画像情報に応じて変調する。 The optical device 4 is an electro-optical device 40 provided for each color light (the electro-optical device for R light is 40R, the electro-optical device for G light is 40G, and the electro-optical device for B light is 40B). And a cross dichroic prism 41 as a color synthesizing optical device. Each electro-optical device 40 includes an incident-side polarizing plate 42, a liquid crystal light valve 43 serving as a light modulation device, and an emission-side polarizing plate 44, and modulates each color light according to image information.
　前記クロスダイクロイックプリズム４１は、４つの直角プリズムを貼り合わせた平面視略正方形状をなし、直角プリズム同士を貼り合わせた界面には、２つの誘電体多層膜が形成されている。前記クロスダイクロイックプリズム４１は、前記誘電体多層膜が前記電気光学装置４０Ｒ，４０Ｂにて変調された色光を反射し、電気光学装置４０Ｇにて変調された色光を透過して、各色光を合成する。 The cross dichroic prism 41 has a substantially square shape in plan view in which four right angle prisms are bonded together, and two dielectric multilayer films are formed at the interface where the right angle prisms are bonded together. In the cross dichroic prism 41, the dielectric multilayer film reflects the color light modulated by the electro- optical devices 40R and 40B, transmits the color light modulated by the electro-optical device 40G, and synthesizes each color light. .
　前記投写レンズ３６は、光軸３６ｊに沿って配置される複数のレンズ（図示省略）を有し、クロスダイクロイックプリズム４１にて合成された光をスクリーン上に拡大投写する。前記ヘッド体３７は前記光学部品用筐体３８に対して前記レンズシフト機構５を支持しており、前記レンズシフト機構５に保持された前記投写レンズ３６は前記光学部品用筐体３８に対して左右方向及び上下方向へ移動自在である。 The projection lens 36 has a plurality of lenses (not shown) arranged along the optical axis 36j, and enlarges and projects the light synthesized by the cross dichroic prism 41 on the screen. The head body 37 supports the lens shift mechanism 5 with respect to the optical component casing 38, and the projection lens 36 held by the lens shift mechanism 5 is relative to the optical component casing 38. It can move in the left-right direction and the up-down direction
　前記レンズアライメント調整装置６は、前記光学ユニット３に対して投写レンズ３６を装着するマウント機構を備え、前記光学ユニット３に装着された前記投写レンズ３６の光軸が当該光学ユニット３の前記光学装置４の光軸に対して傾きを有している場合に、この傾きを調整するために使用される。尚、前記レンズアライメント調整装置６が前記マウント機構を具備せず、投写レンズ３６が前記レンズアライメント調整装置６に対して固定的に設けられたものであっても良い。 The lens alignment adjusting device 6 includes a mount mechanism for mounting the projection lens 36 on the optical unit 3, and the optical axis of the projection lens 36 mounted on the optical unit 3 is the optical device of the optical unit 3. This is used to adjust the inclination when the inclination is 4 with respect to the optical axis. The lens alignment adjustment device 6 may not include the mount mechanism, and the projection lens 36 may be fixedly provided to the lens alignment adjustment device 6.
　前記レンズアライメント調整装置６は、前記光学ユニット３に対して所定の姿勢で保持されたベースプレートと、前記投写レンズ３６が固定されるマウント機構を有するレンズ固定プレートとを備えている。また、前記レンズ固定プレートは第一規制軸を介して前記ベースプレートと揺動自在に結合されている。この第一規制軸は前記レンズ固定プレートに保持された前記投写レンズ３６の光軸３６ｊと直交している。ここで、直交とは、第一規制軸の中心軸を仮想的に延伸した際に、かかる中心軸が前記光軸と直角に交わっていることを言う。また、この装置には、前記前記ベースプレートに対する前記第一規制軸周りでの前記レンズ固定プレートの傾斜角度を設定する第一調整手段が設けられている。 The lens alignment adjusting device 6 includes a base plate held in a predetermined posture with respect to the optical unit 3 and a lens fixing plate having a mount mechanism to which the projection lens 36 is fixed. The lens fixing plate is swingably coupled to the base plate via a first restriction shaft. The first restriction axis is orthogonal to the optical axis 36j of the projection lens 36 held on the lens fixing plate. Here, orthogonal means that when the central axis of the first restriction axis is virtually extended, the central axis intersects the optical axis at a right angle. Further, the apparatus is provided with a first adjusting means for setting an inclination angle of the lens fixing plate around the first regulating axis with respect to the base plate.
　このような装置では、前記レンズ固定プレートは前記第一規制軸を中心として揺動自在であり、当該レンズ固定プレートの前記ベースプレートに対する傾斜角度は前記第一規制軸を中心として自由に変更することが可能である。また、前記ベースプレートに対する前記レンズ固定プレートの傾斜角度は前記第一調整手段によって設定することができる。 In such an apparatus, the lens fixing plate is swingable about the first restriction axis, and an inclination angle of the lens fixing plate with respect to the base plate can be freely changed around the first restriction axis. Is possible. In addition, an inclination angle of the lens fixing plate with respect to the base plate can be set by the first adjusting means.
　その際、前記第一規制軸は前記投写レンズ３６の光軸３６ｊと直交していることから、前記レンズ固定プレートの傾斜角度を変更したとしても、投写レンズの光軸３６ｊ上においては前記ベースプレートと前記レンズ固定プレートとの距離は変化しない。従って、前記レンズアライメント調整装置によれば、光軸上における投写レンズ３６と前記光学装置４との距離を常に一定に保持したまま、前記光学装置４の光軸に対する当該投写レンズ３６の光軸３６ｊの角度精度を任意に補正することが可能である。 At this time, since the first restricting axis is orthogonal to the optical axis 36j of the projection lens 36, even if the inclination angle of the lens fixing plate is changed, the first regulating axis is different from the base plate on the optical axis 36j of the projection lens. The distance from the lens fixing plate does not change. Therefore, according to the lens alignment adjusting device, the optical axis 36j of the projection lens 36 with respect to the optical axis of the optical device 4 is always kept constant while keeping the distance between the projection lens 36 and the optical device 4 on the optical axis constant. It is possible to arbitrarily correct the angle accuracy.
　本発明では、前記ベースプレートと前記レンズ固定プレートとの間に、前記投写レンズ３６の光軸３６ｊと直交する第一規制軸のみを設けても差し支えないが、当該光軸及び前記第一規制軸の双方に直交する第二規制軸を設けることも可能である。このように構成すれば、前記光学装置４の光軸と投写レンズ３６の光軸３６ｊとの角度精度を一層緻密に補正することができる。 In the present invention, it is possible to provide only the first restriction axis orthogonal to the optical axis 36j of the projection lens 36 between the base plate and the lens fixing plate. However, the optical axis and the first restriction axis may be provided. It is also possible to provide a second regulating axis that is orthogonal to both. With this configuration, the angular accuracy between the optical axis of the optical device 4 and the optical axis 36j of the projection lens 36 can be corrected more precisely.
　従って、以降の説明では、第一規制軸及び第二規制軸の双方を設けた例について説明する。 Therefore, in the following description, an example in which both the first restriction axis and the second restriction axis are provided will be described.
　図２は本発明を適用したレンズアライメント調整装置の一例を示す概略図である。このレンズアライメント調整装置６は、前記光学ユニット３に対して投写レンズ３６を装着するための取付け部として機能しており、当該光学ユニット３に設けて使用される。このレンズアライメント装置６は、ベースプレート６２と、前記投写レンズ３６が固定されると共に前記ベースプレート６２に対する傾斜角度が自在に調整可能なレンズ固定プレート６３と、これらベースプレート６２とレンズ固定プレート６３との間に介在する中間プレート６４とから構成されている。これら前記ベースプレート６２、前記レンズ固定プレート６３及び前記中間プレート６４は、後述する投写レンズ３６からの光束の射出方向側から見て、いずれも略矩形に形成されている。 FIG. 2 is a schematic view showing an example of a lens alignment adjusting device to which the present invention is applied. The lens alignment adjusting device 6 functions as an attachment portion for mounting the projection lens 36 to the optical unit 3 and is provided in the optical unit 3 for use. The lens alignment device 6 includes a base plate 62, a lens fixing plate 63 to which the projection lens 36 is fixed and an inclination angle with respect to the base plate 62 can be freely adjusted, and between the base plate 62 and the lens fixing plate 63. The intermediate plate 64 is interposed. The base plate 62, the lens fixing plate 63, and the intermediate plate 64 are all formed in a substantially rectangular shape when viewed from the light exit direction side of the light beam from the projection lens 36 described later.
　前記ベースプレート６２は図２中に一点鎖線で示すレンズシフト調整装置５を介して前記光学ユニット３の前記光学部品用筐体３８に保持されている。このレンズシフト調整装置５は、互いに直交する左右方向及び上下方向へ当該ベースプレート６２を自在に移動させることが可能であり、前記レンズ固定プレート６３に装着された前記投写レンズ３６の光軸３６ｊを前記光学装置４の光軸Ｏに対して、その傾きを変えることなく左右方向及び／又は上下方向へ移動させ、当該投写レンズ３６を通して投写される画像を左右方向及び／又は上下方向へ移動させる。 The base plate 62 is held by the optical component casing 38 of the optical unit 3 via a lens shift adjusting device 5 indicated by a one-dot chain line in FIG. The lens shift adjusting device 5 can freely move the base plate 62 in the horizontal direction and the vertical direction orthogonal to each other, and the optical axis 36j of the projection lens 36 mounted on the lens fixing plate 63 is The optical axis O of the optical device 4 is moved in the horizontal direction and / or the vertical direction without changing its inclination, and the image projected through the projection lens 36 is moved in the horizontal direction and / or the vertical direction.
　前記投写レンズ３６は、円筒状のフロント部３６０と、当該フロント部３６０よりも小径のリア部３６１と、これらフロント部３６０とリア部３６１との間に設けられたフランジ部３６２と、を有している。前記レンズ固定プレート６３、中間プレート６４及びベースプレート６２には中央開口部６３０，６４０，及び６２０が夫々設けられており、前記リア部３６１は前記レンズ固定プレート６３の側からこれら中央開口部６３０，６４０，及び６２０に挿入される。前記光学装置４から射出された光束は前記リア部３６１を通じて前記投写レンズ３６に入射する。 The projection lens 36 includes a cylindrical front part 360, a rear part 361 having a smaller diameter than the front part 360, and a flange part 362 provided between the front part 360 and the rear part 361. ing. The lens fixing plate 63, the intermediate plate 64, and the base plate 62 are provided with central openings 630, 640, and 620, respectively, and the rear portion 361 is provided from the lens fixing plate 63 side with these central openings 630, 640. , And 620. The light beam emitted from the optical device 4 enters the projection lens 36 through the rear portion 361.
　前記投写レンズ３６は図示外のマウント機構によって前記レンズ固定プレート６３に保持される。その際、前記マウント機構の働きによって、前記フランジ部３６２は前記レンズ固定プレート６３と緊密に接触し、前記投写レンズ３６は前記レンズ固定プレート６３を基準として保持される。 The projection lens 36 is held on the lens fixing plate 63 by a mounting mechanism (not shown). At this time, the flange portion 362 comes into close contact with the lens fixing plate 63 by the action of the mount mechanism, and the projection lens 36 is held with the lens fixing plate 63 as a reference.
　一方、前記中間プレート６４は前記第一規制軸としての第一センターピン１１を介して前記ベースプレート６２と結合されており、かかる第一センターピン１１を中心として前記ベースプレート６２に対して揺動自在に配置されている。この第一センターピン１１は、前記レンズ固定プレート６３に所定姿勢で保持された投写レンズ３６の光軸３６ｊと直交する軸Ｖ上に配置されている。この軸Ｖは前記Ｚ方向に合致している。このため、前記中間プレート６４は前記第一センターピン１１を中心として揺動することによって、前記ベースプレート６２に対する左右方向（図２の±Ｘ方向）の傾斜角度を自在に変更することが可能となっている。 On the other hand, the intermediate plate 64 is coupled to the base plate 62 via a first center pin 11 as the first regulating shaft, and is swingable with respect to the base plate 62 about the first center pin 11. Is arranged. The first center pin 11 is disposed on an axis V orthogonal to the optical axis 36j of the projection lens 36 held in a predetermined posture on the lens fixing plate 63. This axis V coincides with the Z direction. For this reason, the intermediate plate 64 swings about the first center pin 11 to freely change the inclination angle in the left-right direction (± X direction in FIG. 2) with respect to the base plate 62. ing.
　また、前記中間プレート６４は第二規制軸としての第二センターピン１２を介して前記レンズ固定プレート６３と結合されており、かかる第二センターピン１２を中心として前記レンズ固定プレート６３に対して揺動自在に配置されている。この第二センターピン１２は、前記レンズ固定プレート６３に所定姿勢で保持された投写レンズ３６の光軸３６ｊと直交する軸Ｈ上に配置されている。この軸Ｈは前記Ｘ方向に合致している。このため、前記レンズ固定プレート６３は前記第二センターピン１２を中心として揺動することによって、前記中間プレート６４に対する上下方向（図２の±Ｚ方向）の傾斜角度を自在に変更することが可能となっている。 The intermediate plate 64 is coupled to the lens fixing plate 63 via a second center pin 12 serving as a second restricting shaft, and swings with respect to the lens fixing plate 63 about the second center pin 12. It is arranged freely. The second center pin 12 is disposed on an axis H orthogonal to the optical axis 36j of the projection lens 36 held in a predetermined posture on the lens fixing plate 63. This axis H coincides with the X direction. Therefore, the lens fixing plate 63 swings around the second center pin 12 to freely change the tilt angle in the vertical direction (± Z direction in FIG. 2) with respect to the intermediate plate 64. It has become.
　図３は前記中間プレート６４に面した前記ベースプレート６２の一面を示す斜視図である。前記ベースプレート６２には前記中央開口部６２０を挟んでその両側に一対の支持部材６２１が固定されている。また、前記ベースプレート６２に面した中間プレート６４の一面にも前記中央開口部６４０を挟んでその両側に一対の支持部材６４１ａが固定されている（図２参照）。前記中間プレート６４の支持部材６４１ａと前記ベースプレート６２の支持部材６２１の外側に重なっており、前記第一センターピン１１は前記ベースプレート６２の支持部材６２１と前記中間プレート６４の支持部材６４１ａを貫通して、これらベースプレート６２と中間プレート６４とを揺動自在に結合している。また、前記ベースプレート６２と前記中間プレート６４の支持部材６４１ａとの間、前記中間プレート６４と前記ベースプレート６２の支持部材６２１との間には所定の空間が設けられており、前記第一センターピン１１を中心とした中間プレート６４の揺動を妨げないようになっている。 FIG. 3 is a perspective view showing one surface of the base plate 62 facing the intermediate plate 64. A pair of support members 621 are fixed to the base plate 62 on both sides of the central opening 620. A pair of support members 641a are also fixed to one surface of the intermediate plate 64 facing the base plate 62 on both sides of the central opening 640 (see FIG. 2). The first center pin 11 passes through the support member 621 of the base plate 62 and the support member 641a of the intermediate plate 64 so as to overlap the support member 641a of the intermediate plate 64 and the support member 621 of the base plate 62. The base plate 62 and the intermediate plate 64 are coupled in a swingable manner. A predetermined space is provided between the base plate 62 and the support member 641a of the intermediate plate 64, and between the intermediate plate 64 and the support member 621 of the base plate 62, and the first center pin 11 is provided. The center plate 64 is not hindered from swinging.
　図４は前記レンズアライメント調整装置６を下方から＋Ｚ方向へ観察した図である。前記レンズ固定プレート６３には前記中央開口部６３０を挟んでその両側に一対の支持部材６３１が固定されている。また、前記レンズ固定プレート６３に面した中間プレート６４の一面にも前記中央開口部６４０を挟んでその両側に一対の支持部材６４１ｂが固定されている。前記レンズ固定プレート６３の支持部材６３１と前記中間プレート６４の支持部材６４１ｂの外側に重なっており、前記第二センターピン１２は前記レンズ固定プレート６３の支持部材６３１と前記中間プレート６４の支持部材６４１ｂを貫通して、これらレンズ固定プレート６３と中間プレート６４とを揺動自在に結合している。また、前記中間プレート６４と前記レンズ固定プレート６３の支持部材６３１との間、前記レンズ固定プレート６３と前記中間プレート６４の支持部材６４１ｂとの間には所定の空間が設けられており、前記第二センターピン１２を中心としたレンズ固定プレート６３の揺動を妨げないようになっている。 FIG. 4 is a view of the lens alignment adjusting device 6 observed from below in the + Z direction. A pair of support members 631 are fixed to the lens fixing plate 63 on both sides of the central opening 630. A pair of support members 641b are also fixed to one surface of the intermediate plate 64 facing the lens fixing plate 63 with the central opening 640 interposed therebetween. The second center pin 12 overlaps the outside of the support member 631 of the lens fixing plate 63 and the support member 641b of the intermediate plate 64, and the second center pin 12 is supported by the support member 631 of the lens fixing plate 63 and the support member 641b of the intermediate plate 64. The lens fixing plate 63 and the intermediate plate 64 are pivotably coupled to each other. A predetermined space is provided between the intermediate plate 64 and the support member 631 of the lens fixing plate 63, and between the lens fixing plate 63 and the support member 641b of the intermediate plate 64. The swing of the lens fixing plate 63 around the two center pins 12 is not hindered.
　従って、前記レンズシフト調整装置５によって所定姿勢で保持されたベースプレート６２に対して、前記中間プレート６４は左右方向への傾斜角度を変更可能であり、また、この中間プレート６４に対して、前記レンズ固定プレート６３は上下方向の傾斜角度を変更可能であり、結果として、前記レンズ固定プレート６３は前記ベースプレート６２に対して左右方向及び上下方向の傾斜角を任意に変更することができる。すなわち、前述したマウント機構を用いて前記投写レンズ３６を前記レンズ固定プレート６３に対して所定姿勢で保持することにより、当該投写レンズ３６の光軸３６ｊを光学装置４の光軸Ｏに対して自由に傾斜させることが可能である。 Accordingly, the intermediate plate 64 can change the inclination angle in the left-right direction with respect to the base plate 62 held in a predetermined posture by the lens shift adjusting device 5, and the lens can be changed with respect to the intermediate plate 64. The fixed plate 63 can change the inclination angle in the vertical direction. As a result, the lens fixed plate 63 can arbitrarily change the horizontal and vertical inclination angles with respect to the base plate 62. That is, the projection lens 36 is held in a predetermined posture with respect to the lens fixing plate 63 by using the mounting mechanism described above, so that the optical axis 36j of the projection lens 36 is free with respect to the optical axis O of the optical device 4. It is possible to incline.
　次に、前記ベースプレート６２に対する前記中間プレート６４の傾斜角度を設定するための第一調整手段について説明する。図４に示すように、この第一調整手段は前記ベースプレート６２と前記中間プレート６４に挟まれた空間に配置されており、付勢部材としてのコイルスプリング６２２と、当該コイルスプリング６２２の付勢力に抗して前記ベースプレート６２と前記中間プレート６４との距離を変更する第一間隔変更部材１３と、を備えている。また、前記第一間隔変更部材１３は、調整ネジ６２３の締結量に応じて前記ベースプレート６２上を進退するカム板６２４と、前記中間プレート６４に固定されると共に前記カム板６２４に当接する受圧部材６４２とから構成されている。 Next, the first adjusting means for setting the inclination angle of the intermediate plate 64 with respect to the base plate 62 will be described. As shown in FIG. 4, the first adjusting means is disposed in a space between the base plate 62 and the intermediate plate 64, and a coil spring 622 as an urging member and the urging force of the coil spring 622 are used. Accordingly, a first interval changing member 13 that changes the distance between the base plate 62 and the intermediate plate 64 is provided. Further, the first interval changing member 13 includes a cam plate 624 that advances and retreats on the base plate 62 according to the fastening amount of the adjusting screw 623, and a pressure receiving member that is fixed to the intermediate plate 64 and contacts the cam plate 624. 642.
　図３には前記ベースプレート６２に取り付けられた前記カム板６２４が示されている。このカム板６２４はＺ方向に細長く形成されて前記ベースプレート６２の辺に沿って固定されている。前記カム板６２４の前記受圧部材６４２との当接面はベースプレート６２に対して所定角度傾斜した傾斜面となっており、当該カム板６２４をＸＹ平面で切断した断面形状は略楔形状をなしている。前記カム板６２４の長手方向の両端にはＸ方向に沿った一対の長穴が形成されており、前記カム板はこれら一対の長穴を貫通する２本のボルトによって前記ベースプレート６２に保持されている。従って、前記カム板６２４は±Ｘ方向に沿ってベースプレート６２に対する固定位置を自由に調整可能である。 FIG. 3 shows the cam plate 624 attached to the base plate 62. The cam plate 624 is elongated in the Z direction and is fixed along the side of the base plate 62. The contact surface of the cam plate 624 with the pressure receiving member 642 is an inclined surface inclined by a predetermined angle with respect to the base plate 62, and the cross-sectional shape of the cam plate 624 cut along the XY plane forms a substantially wedge shape. Yes. A pair of elongated holes along the X direction is formed at both ends in the longitudinal direction of the cam plate 624, and the cam plate is held on the base plate 62 by two bolts passing through the pair of elongated holes. Yes. Accordingly, the cam plate 624 can freely adjust the fixing position with respect to the base plate 62 along the ± X directions.
　また、図４に示すように、前記ベースプレート６２にはネジ取付け部６２５が固定されており、このネジ取付け部６２５には調整ネジ６２３が螺合している。前記調整ネジ６２３は先端が前記カム板６２４に当接しており、前記ネジ取付け部６２５に対する調整ネジ６２３の締め込み量を増加させると、前記カム板６２４が第一センターピン１１に向けて進出する。 Further, as shown in FIG. 4, a screw mounting portion 625 is fixed to the base plate 62, and an adjustment screw 623 is screwed to the screw mounting portion 625. The tip of the adjustment screw 623 is in contact with the cam plate 624, and when the tightening amount of the adjustment screw 623 with respect to the screw attachment portion 625 is increased, the cam plate 624 advances toward the first center pin 11. .
　更に、前記受圧部材６４２は前記カム板６２４と略同じ形状を有しているが、前記カム板６２４と傾斜面同士を当接させるようにして、当該カム板６２４とは逆向きに前記中間プレート６４に固定されている。この受圧部材６４２は前記カム板６２４とは異なり、前記中間プレート６４の一定位置に固定されている。 Further, the pressure receiving member 642 has substantially the same shape as the cam plate 624, but the intermediate plate is opposed to the cam plate 624 so that the cam plate 624 and the inclined surfaces are in contact with each other. 64 is fixed. Unlike the cam plate 624, the pressure receiving member 642 is fixed at a fixed position on the intermediate plate 64.
　前記コイルスプリング６２２は前記ベースプレート６２と前記中間プレート６４との間に配置され、第一センターピン１１を挟んで前記第一間隔変更部材１３とは反対側に位置している。また、前記コイルスプリング６２２はＺ方向に沿って一対が配置されている。このため、前記コイルスプリング６２２の付勢力によって、前記中間プレート６４は前記第一センターピン１１の周囲で回転し、前記間隔変更部材１３のカム板６２４と受圧部６４２が常に圧接することになる。 The coil spring 622 is disposed between the base plate 62 and the intermediate plate 64 and is located on the opposite side to the first interval changing member 13 with the first center pin 11 interposed therebetween. A pair of the coil springs 622 is arranged along the Z direction. For this reason, the intermediate plate 64 rotates around the first center pin 11 by the biasing force of the coil spring 622, and the cam plate 624 and the pressure receiving portion 642 of the interval changing member 13 are always in pressure contact.
　このように構成された前記第一調整手段では、前記ネジ取付け部６２５に対する前記調整ネジ６２３の締め込み量を増加させると、前記カム板６２４が第一センターピン１１に向けて進出し、前記コイルスプリング６２２の付勢力に抗して受圧部材６４２を押圧するようになっている。これにより、前記中間プレート６４は前記ベースプレート６２に対して前記コイルスプリング６２２が圧縮される方向へ傾斜することになる。また、前記ネジ取付け部６２５に対する前記調整ネジ６２３の締め込み量を減少させると、前記コイルスプリング６２２の付勢力によって受圧部材６４２が前記カム板６２４を押圧するので、前記カム板６２４は第一センターピン１１と反対方向へ後退する。これにより、前記中間プレート６４は前記ベースプレート６２に対して前記コイルスプリング６２２が伸びる方向へ傾斜することになる。 In the first adjusting means configured as described above, when the tightening amount of the adjusting screw 623 with respect to the screw mounting portion 625 is increased, the cam plate 624 advances toward the first center pin 11, and the coil The pressure receiving member 642 is pressed against the urging force of the spring 622. Accordingly, the intermediate plate 64 is inclined with respect to the base plate 62 in the direction in which the coil spring 622 is compressed. Further, when the tightening amount of the adjustment screw 623 with respect to the screw mounting portion 625 is decreased, the pressure receiving member 642 presses the cam plate 624 by the urging force of the coil spring 622, so that the cam plate 624 is the first center. Retreat in the opposite direction to the pin 11. Accordingly, the intermediate plate 64 is inclined with respect to the base plate 62 in a direction in which the coil spring 622 extends.
　前記コイルスプリング６２２の付勢力を効果的に働かせるために、当該コイルスプリング６２２は前記第一センターピン１１から離れた位置、換言すると、前記ベースプレート６２及び前記中間プレート６４の外縁部の近傍に配置することが好ましい。また、前記ネジ取付け部６２５及び前記調整ネジ６２３は、使用者の操作性を良くするため、前記ベースプレート６２の外縁部の近傍に設けることが好ましい。 In order to effectively apply the urging force of the coil spring 622, the coil spring 622 is disposed at a position away from the first center pin 11, in other words, in the vicinity of the outer edge portions of the base plate 62 and the intermediate plate 64. It is preferable. In addition, the screw mounting portion 625 and the adjustment screw 623 are preferably provided in the vicinity of the outer edge portion of the base plate 62 in order to improve the operability for the user.
　一方、前記中間プレート６４と前記レンズ固定プレート６３の間には、前記第一調整手段と同じ構成の第二調整手段が設けられている。この第二調整手段は前記中間プレート６４と前記レンズ固定プレート６３に挟まれた空間に配置されており、付勢部材としてのコイルスプリング６３２と、当該コイルスプリング６３２の付勢力に抗して前記中間プレート６４と前記レンズ固定プレート６３との距離を変更する第二間隔変更部材１４と、を備えている。また、前記第二間隔変更部材１４は、調整ネジ６４５の締結量に応じて前記中間プレート６４上を進退するカム板６４３と、前記レンズ固定プレート６３に固定されると共に前記カム板６４３に当接する受圧部材６３３とから構成されている。更に、前記調整ネジ６４５は前記中間プレートに固定されたネジ取付け部６４４に螺合している。 On the other hand, between the intermediate plate 64 and the lens fixing plate 63, second adjusting means having the same configuration as the first adjusting means is provided. The second adjusting means is disposed in a space between the intermediate plate 64 and the lens fixing plate 63, and the coil spring 632 as an urging member and the intermediate force against the urging force of the coil spring 632. And a second interval changing member 14 for changing the distance between the plate 64 and the lens fixing plate 63. The second interval changing member 14 is fixed to the cam plate 643 that advances and retreats on the intermediate plate 64 according to the fastening amount of the adjusting screw 645, and the lens fixing plate 63, and contacts the cam plate 643. And a pressure receiving member 633. Further, the adjustment screw 645 is screwed into a screw mounting portion 644 fixed to the intermediate plate.
　このように構成された前記第二調整手段では、前記ネジ取付け部６４４に対する前記調整ネジ６４５の締め込み量を増加させると、前記カム板６４３が第二センターピン１２に向けて進出し、前記コイルスプリング６３２の付勢力に抗して受圧部材６３３を押圧するようになっている。これにより、前記レンズ固定プレート６３は前記中間プレート６４に対して前記コイルスプリング６３２が圧縮される方向へ傾斜することになる。また、前記ネジ取付け部６４４に対する前記調整ネジ６４５の締め込み量を減少させると、前記コイルスプリング６３２の付勢力によって受圧部材６３３が前記カム板６４３を押圧するので、前記カム板６４３は第二センターピン１２と反対方向へ後退する。これにより、前記レンズ固定プレート６３は前記中間プレート６４に対して前記コイルスプリング６３２が伸びる方向へ傾斜することになる。 In the second adjusting means configured as described above, when the tightening amount of the adjusting screw 645 with respect to the screw mounting portion 644 is increased, the cam plate 643 advances toward the second center pin 12, and the coil The pressure receiving member 633 is pressed against the urging force of the spring 632. Accordingly, the lens fixing plate 63 is inclined with respect to the intermediate plate 64 in a direction in which the coil spring 632 is compressed. Further, when the tightening amount of the adjustment screw 645 with respect to the screw mounting portion 644 is decreased, the pressure receiving member 633 presses the cam plate 643 by the urging force of the coil spring 632, so that the cam plate 643 is in the second center. Retreat in the opposite direction to the pin 12. Accordingly, the lens fixing plate 63 is inclined with respect to the intermediate plate 64 in a direction in which the coil spring 632 extends.
　ここで、前記コイルスプリング６３２は、図２に示すように＋Ｚ方向側に配置されている。これは、前記コイルスプリング６３２を－Ｚ方向に配置した場合、投写レンズ３６の自重による負荷が加わるため、前記ネジ取付け部６４４に対する前記調整ネジ６４５の締め込み量を減少させても、前記レンズ固定プレート６３は前記中間プレート６４に対して前記コイルスプリング６３２が伸びる方向へ傾斜し難くなるためである。換言すると、前記コイルスプリング６３２を＋Ｚ方向側に配置することにより、前記レンズ固定プレート６３の前記中間プレート６４に対する搖動を円滑に行うことができる。 Here, the coil spring 632 is arranged on the + Z direction side as shown in FIG. This is because, when the coil spring 632 is arranged in the −Z direction, a load due to the weight of the projection lens 36 is applied, so that the lens fixing is possible even if the tightening amount of the adjustment screw 645 with respect to the screw mounting portion 644 is reduced. This is because the plate 63 is not easily inclined with respect to the intermediate plate 64 in the direction in which the coil spring 632 extends. In other words, by arranging the coil spring 632 on the + Z direction side, the lens fixing plate 63 can be smoothly moved with respect to the intermediate plate 64.
　すなわち、このレンズアライメント調整装置６では、前記ベースプレート６２と中間プレート６４との間に設けられた第一調整手段、前記中間プレート６４と前記レンズ固定プレート６３との間に設けられた第二調整手段のそれぞれの調整ネジ６２３，６４５の螺合量を変更することにより、前記ベースプレート６２に対する前記中間プレート６４の左右方向の傾斜角度、前記中間プレート６４に対する前記レンズ固定プレート６３の上下方向の傾斜角度を任意に設定することができ、結果として、光学装置４の光軸Ｏに対する投写レンズ３６の光軸３６ｊの傾きを自由に調整することができる。また、図２乃至図４に示した第一センターピン１１の配置と、第二センターピン１２の配置とを入れ替えて、このレンズアライメント調整装置６を構成してもよい。換言すると、ベースプレート６２と中間プレート６４との間に設けた第二調整手段で、光学装置４の光軸Ｏに対する投写レンズ３６の光軸３６ｊの上下方向の傾きを調整し、中間プレート６４とレンズ固定プレート６３との間に設けた第一調整手段で左右方向の傾きを調整するようにしても、同様の効果を得ることができる。 That is, in the lens alignment adjusting device 6, first adjusting means provided between the base plate 62 and the intermediate plate 64, and second adjusting means provided between the intermediate plate 64 and the lens fixing plate 63. By changing the screwing amount of each of the adjusting screws 623 and 645, the inclination angle of the intermediate plate 64 with respect to the base plate 62 in the horizontal direction and the inclination angle of the lens fixing plate 63 with respect to the intermediate plate 64 in the vertical direction are changed. As a result, the inclination of the optical axis 36j of the projection lens 36 with respect to the optical axis O of the optical device 4 can be freely adjusted. Further, the lens alignment adjusting device 6 may be configured by exchanging the arrangement of the first center pin 11 and the arrangement of the second center pin 12 shown in FIGS. In other words, the second adjusting means provided between the base plate 62 and the intermediate plate 64 adjusts the vertical inclination of the optical axis 36j of the projection lens 36 with respect to the optical axis O of the optical device 4, and the intermediate plate 64 and the lens. The same effect can be obtained by adjusting the inclination in the left-right direction with the first adjusting means provided between the fixing plate 63 and the fixing plate 63.
　図２乃至図４から把握されるように、前記ベースプレート６２の前記中間プレート６４との対向面には、当該ベースプレート６２の辺に沿って前記一対の支持部材６２１及び前記カム板６２４が配置されている。また、前記レンズ固定プレート６３の前記中間プレート６４との対向面には、当該レンズ固定プレート６３の辺に沿って前記一対の支持部材６３１及び前記受圧部材６３３が配置されている。更に、前記中間プレート６４の前記ベースプレート６２との対向面には前記一対の支持部材６４１ａ及び前記受圧部材６４２が配置される一方、前記中間プレート６４の前記レンズ固定プレートとの対向面には前記一対の支持部材６４１ｂ及び前記カム板６４３が配置されている。 As understood from FIGS. 2 to 4, the pair of support members 621 and the cam plate 624 are arranged along the side of the base plate 62 on the surface of the base plate 62 facing the intermediate plate 64. Yes. Further, the pair of support members 631 and the pressure receiving member 633 are arranged along the side of the lens fixing plate 63 on the surface of the lens fixing plate 63 facing the intermediate plate 64. Further, the pair of support members 641a and the pressure receiving member 642 are disposed on the surface of the intermediate plate 64 facing the base plate 62, while the pair of support members 641a and the pressure receiving member 642 are disposed on the surface of the intermediate plate 64 facing the lens fixing plate. The support member 641b and the cam plate 643 are disposed.
　重い投写レンズ３６をこのレンズアライメント調整装置６によって正しく保持するためには、互いに揺動自在に結合された前記ベースプレート６２、前記中間プレート６４及び前記レンズ固定プレート６３の変形を排除することが重要である。しかし、そのためには各プレートの板厚を大きくする必要が生じ、装置重量の増加を回避することができない。図２乃至図４に示した例では、略矩形状に形成された前記ベースプレート６２、前記中間プレート６４及び前記レンズ固定プレート６３の各辺に対して、前記支持部材６２１，６４１ａ，６４１ｂ，６３１、前記カム板６２４，６４３及び前記受圧部材６４２，６３３を配置しており、これら部材はそれぞれが断面略矩形または略楔形状の棒状に形成されている。このため、前記支持部材６２１，６４１ａ，６４１ｂ，６３１、前記カム板６２４，６４３及び前記受圧部材６４２，６３３を前記ベースプレート６２、前記中間プレート６４及び前記レンズ固定プレート６３に固定することで、これら部材が各プレート６２，６３，６４の補強材として機能することになる。 In order to correctly hold the heavy projection lens 36 by the lens alignment adjusting device 6, it is important to eliminate the deformation of the base plate 62, the intermediate plate 64, and the lens fixing plate 63 that are slidably coupled to each other. is there. However, for that purpose, it is necessary to increase the thickness of each plate, and an increase in the weight of the apparatus cannot be avoided. 2 to 4, the support members 621, 641 a, 641 b, 631, the sides of the base plate 62, the intermediate plate 64, and the lens fixing plate 63 formed in a substantially rectangular shape, The cam plates 624 and 643 and the pressure receiving members 642 and 633 are arranged, and each of these members is formed in a rod shape having a substantially rectangular cross section or a substantially wedge shape. Therefore, by fixing the support members 621, 641a, 641b, 631, the cam plates 624, 643 and the pressure receiving members 642, 633 to the base plate 62, the intermediate plate 64 and the lens fixing plate 63, these members are fixed. Functions as a reinforcing material for each of the plates 62, 63, 64.
　従って、前記ベースプレート６２、前記中間プレート６４及び前記レンズ固定プレート６３の板厚を小さく設定した場合であっても、前記支持部材６２１，６４１ａ，６４１ｂ，６３１、前記カム板６２４，６４３及び前記受圧部材６４２，６３３の剛性を利用して、これらプレート６２，６３，６４の変形を抑えることが可能である。これにより、レンズアライメント調整装置６の軽量化が図られている。 Therefore, even when the base plate 62, the intermediate plate 64, and the lens fixing plate 63 are set to have small thicknesses, the support members 621, 641a, 641b, 631, the cam plates 624, 643, and the pressure receiving member. It is possible to suppress the deformation of these plates 62, 63, 64 by utilizing the rigidity of 642,633. Thereby, weight reduction of the lens alignment adjustment apparatus 6 is achieved.
　尚、前記支持部材６２１，６４１ａ，６４１ｂ，６３１及び受圧部材６４２，６３３については、それぞれを前記ベースプレート６２、前記中間プレート６４及び前記レンズ固定プレート６３とダイカスト鋳造等の製法を用いて一体に成形しても差し支えない。 The support members 621, 641a, 641b, 631 and the pressure receiving members 642, 633 are integrally formed with the base plate 62, the intermediate plate 64, and the lens fixing plate 63 using a manufacturing method such as die casting. There is no problem.
　そして、以上のように構成されたレンズアライメント調整装置６によれば、以下の効果を得ることができる。 And according to the lens alignment adjusting device 6 configured as described above, the following effects can be obtained.
　レンズシフト調整装置６を介して前記ベースプレート６２がプロジェクター１の光学部品用筐体３８に保持されており、このベースプレート６２に対して中間プレート６４の左右方向の傾斜角度を自由に調整可能であり、また、当該中間プレート６４に対して前記レンズ固定プレート６３の上下方向の傾斜角度を自由に調整可能であり、結果として、レンズ固定プレート６３に保持された投写レンズ３６の左右方向及び上下方向の傾斜角度を光学部品用筐体３８に対して自由に調整することができる。 The base plate 62 is held by the optical component casing 38 of the projector 1 via the lens shift adjusting device 6, and the inclination angle of the intermediate plate 64 in the left-right direction can be freely adjusted with respect to the base plate 62, Further, the inclination angle in the vertical direction of the lens fixing plate 63 with respect to the intermediate plate 64 can be freely adjusted. As a result, the inclination of the projection lens 36 held in the lens fixing plate 63 in the horizontal direction and the vertical direction The angle can be freely adjusted with respect to the optical component casing 38.
　この際、ベースプレート６２と中間プレート６４は投写レンズ３６の光軸３６ｊに対して直交する第一センターピン１１を介して揺動自在に結合されており、ベースプレート６２に対する中間プレート６４の傾斜角度を変更しても、前記光軸３６ｊ上においてはこれら両プレート６２，６４の距離が変化することはない。また、中間プレート６４とレンズ固定プレート６３は投写レンズ３６の光軸３６ｊ及び前記第一センターピン１１に対して直交する第二センターピン１２を介して揺動自在に結合されており、ベースプレート６２に対する中間プレート６４の傾斜角度を変更しても、前記光軸３６ｊ上においてこれら両プレート６３，６４の距離が変化することはない。 At this time, the base plate 62 and the intermediate plate 64 are swingably coupled via the first center pin 11 orthogonal to the optical axis 36j of the projection lens 36, and the inclination angle of the intermediate plate 64 with respect to the base plate 62 is changed. Even so, the distance between the plates 62 and 64 does not change on the optical axis 36j. The intermediate plate 64 and the lens fixing plate 63 are slidably coupled via the optical axis 36 j of the projection lens 36 and the second center pin 12 orthogonal to the first center pin 11, and Even if the inclination angle of the intermediate plate 64 is changed, the distance between the plates 63 and 64 does not change on the optical axis 36j.
　従って、このレンズアライメント調整装置６によれば、左右方向及び上下方向の二方向に関して投写レンズ３６の光軸３６ｊの傾斜角度を変更したとしても、光軸３６ｊ上においてはプロジェクター１の光学装置４によって変調された投写光の経路長を一定に維持したまま、投写レンズ３６の角度精度を任意に補正することができる。 Therefore, according to this lens alignment adjusting device 6, even if the inclination angle of the optical axis 36j of the projection lens 36 is changed in two directions of the left and right direction and the up and down direction, the optical device 4 of the projector 1 on the optical axis 36j. The angle accuracy of the projection lens 36 can be arbitrarily corrected while the path length of the modulated projection light is kept constant.

Claims (6)

  1. プロジェクター(1)に設けられて投写レンズ(36)を保持すると共に、当該投写レンズの前記プロジェクターに対する光軸の傾きを調整可能なレンズアライメント調整装置(6)であって、
    前記プロジェクターに対して所定の姿勢で保持されたベースプレート(62)と、前記投写レンズが固定されるレンズ固定プレート(63)と、を有し、
    前記レンズ固定プレートは前記投写レンズの光軸(36j)と直交する第一規制軸(11)を介して前記ベースプレートと揺動自在に結合され、
    前記ベースプレートに対する前記第一規制軸周りでの前記レンズ固定プレートの傾斜角度を設定する第一調整手段が設けられることを特徴とするレンズアライメント調整装置。     A lens alignment adjustment device (6) that is provided in the projector (1) and holds the projection lens (36) and can adjust the inclination of the optical axis of the projection lens with respect to the projector,
    A base plate (62) held in a predetermined posture with respect to the projector, and a lens fixing plate (63) to which the projection lens is fixed,
    The lens fixing plate is swingably coupled to the base plate via a first regulating axis (11) orthogonal to the optical axis (36j) of the projection lens,
    A lens alignment adjusting device, comprising: a first adjusting means for setting an inclination angle of the lens fixing plate around the first regulating axis with respect to the base plate.
  2. 前記ベースプレート(62)及びレンズ固定プレート(63)は中央に前記投写レンズ(36)の一部が遊嵌する開口部(620,630)を有して略矩形状に形成されると共に、前記ベースプレートの周囲の辺には前記第一規制軸(11)を保持する支持部材(621)が設けられていることを特徴とする請求項１記載のレンズアライメント調整装置。 The base plate (62) and the lens fixing plate (63) are formed in a substantially rectangular shape having an opening (620, 630) in which a part of the projection lens (36) is loosely fitted in the center, and around the base plate. The lens alignment adjusting device according to claim 1, wherein a support member (621) for holding the first regulating shaft (11) is provided on the side of the lens.
  3. 前記第一調整手段は、前記ベースプレート(62)と前記レンズ固定プレート(63)との間に圧縮した状態で配置された付勢部材(622)と、前記付勢部材の付勢力に抗して前記ベースプレートと前記レンズ固定プレートの間の距離を変更する間隔変更部材(13)と、を備え、
    前記付勢部材と前記間隔調整部材とは、前記第一規制軸を挟んで配置されていることを特徴とする請求項１又は請求項２記載のレンズアライメント調整装置。     The first adjustment means resists a biasing member (622) disposed in a compressed state between the base plate (62) and the lens fixing plate (63), and a biasing force of the biasing member. An interval changing member (13) for changing a distance between the base plate and the lens fixing plate, and
    3. The lens alignment adjusting device according to claim 1, wherein the biasing member and the interval adjusting member are arranged with the first regulating shaft interposed therebetween.
  4. 前記間隔調整部材(13)は調整ネジ(623)の螺合量に応じて前記ベースプレートと前記レンズ固定プレートとの間隔を変更するカム板(624)を含み、前記カム板は前記ベースプレート又は前記レンズ固定プレートの辺に沿って前記第一規制軸(11)と平行に設けられていることを特徴とする請求項３記載のレンズアライメント調整装置。 The interval adjusting member (13) includes a cam plate (624) that changes an interval between the base plate and the lens fixing plate according to a screwing amount of an adjusting screw (623), and the cam plate is the base plate or the lens. 4. The lens alignment adjusting device according to claim 3, wherein the lens alignment adjusting device is provided in parallel with the first restriction shaft (11) along the side of the fixed plate.
  5. 前記ベースプレート(62)と前記レンズ固定プレート(63)との間には中間プレート(64)が設けられ、
    前記中間プレートは前記第一規制軸(11)を介して前記ベースプレートと揺動自在に結合される一方、
    前記レンズ固定プレートは、前記投写レンズ(36)の光軸(36j)、及び前記投写レンズの光射出方向から見て前記第一規制軸と直交する第二規制軸(12)を介して前記中間プレートと揺動自在に結合され、
    前記ベースプレートに対する前記第二規制軸周りの前記レンズ固定プレートの傾斜角度を設定する第二調整手段が設けられることを特徴とする請求項１記載のレンズアライメント調整装置。     An intermediate plate (64) is provided between the base plate (62) and the lens fixing plate (63),
    The intermediate plate is swingably coupled to the base plate via the first restriction shaft (11),
    The lens fixing plate includes the intermediate axis via an optical axis (36j) of the projection lens (36) and a second restriction axis (12) orthogonal to the first restriction axis when viewed from the light emission direction of the projection lens. It is connected to the plate in a swingable manner,
    2. The lens alignment adjusting device according to claim 1, further comprising second adjusting means for setting an inclination angle of the lens fixing plate around the second regulating axis with respect to the base plate.
  6. 光源装置(31)と、
    前記光源装置から射出された光を変調して射出する光変調装置(43)と、
    前記光変調装置で変調された光を投写する前記投写レンズ(36)と、
    前記投写レンズを保持する請求項１乃至５のいずれかに記載のレンズアライメント調整装置(6)と、
    を備えたプロジェクター。     A light source device (31);
    A light modulator (43) for modulating and emitting light emitted from the light source device;
    The projection lens (36) for projecting light modulated by the light modulator;
    The lens alignment adjusting device (6) according to any one of claims 1 to 5, which holds the projection lens;
    With projector.
PCT/JP2017/001004 2016-01-20 2017-01-13 Lens alignment adjustment device and projector equipped with same WO2017126426A1 (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
US16/070,942 US10571785B2 (en) 2016-01-20 2017-01-13 Lens alignment adjustment device and projector equipped with the same
CN201780007176.1A CN108475003B (en) 2016-01-20 2017-01-13 Lens alignment adjusting device and projector having the same

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2016-008586 2016-01-20
JP2016008586A JP6721990B2 (en) 2016-01-20 2016-01-20 Lens alignment adjusting device and projector equipped with the same

Publications (1)

Publication Number Publication Date
WO2017126426A1 true WO2017126426A1 (en) 2017-07-27

Family

ID=59361717

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/JP2017/001004 WO2017126426A1 (en) 2016-01-20 2017-01-13 Lens alignment adjustment device and projector equipped with same

Country Status (4)

Country Link
US (1) US10571785B2 (en)
JP (1) JP6721990B2 (en)
CN (1) CN108475003B (en)
WO (1) WO2017126426A1 (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2020091336A (en) * 2018-12-03 2020-06-11 Thk株式会社 Electric alignment device and lens alignment system
WO2020116373A1 (en) * 2018-12-03 2020-06-11 Thk株式会社 Alignment device and lens alignment system
JP2021018103A (en) * 2019-07-18 2021-02-15 Thk株式会社 Alignment device and lens alignment system

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109725479B (en) 2017-10-31 2021-08-10 中强光电股份有限公司 Projector and lens module
CN109683437B (en) * 2019-03-01 2023-08-18 北京北广梯影广告传媒有限公司 Projector equipment for preventing virtual focus
CN210800830U (en) * 2019-07-31 2020-06-19 广州市浩洋电子股份有限公司 Stage lamp light path adjusting structure and stage lamp with same

Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH08195923A (en) * 1994-11-16 1996-07-30 Sony Corp Projector
JPH09163273A (en) * 1995-12-08 1997-06-20 Sony Corp Projector device
JP2001218102A (en) * 2000-02-04 2001-08-10 Casio Comput Co Ltd Tilt adjustment device for imaging element
JP2004004206A (en) * 2002-05-31 2004-01-08 Matsushita Electric Ind Co Ltd Projection-type display device
JP2008517348A (en) * 2004-10-19 2008-05-22 レイセオン・カンパニー Optical mounting body for positioning and adjustment with 6 degrees of freedom
JP2008292778A (en) * 2007-05-25 2008-12-04 Sony Corp Lens device and imaging apparatus
JP2010008761A (en) * 2008-06-27 2010-01-14 Sharp Corp Optical scanner and image-forming device equipped with the same
JP2014071195A (en) * 2012-09-28 2014-04-21 Seiko Epson Corp Projector

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP4148241B2 (en) * 2004-06-03 2008-09-10 セイコーエプソン株式会社 projector
US8004552B2 (en) 2008-06-27 2011-08-23 Sharp Kabushiki Kaisha Optical scanning device and image forming apparatus
JP5263002B2 (en) 2009-05-29 2013-08-14 パナソニック株式会社 Lens mounting device

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH08195923A (en) * 1994-11-16 1996-07-30 Sony Corp Projector
JPH09163273A (en) * 1995-12-08 1997-06-20 Sony Corp Projector device
JP2001218102A (en) * 2000-02-04 2001-08-10 Casio Comput Co Ltd Tilt adjustment device for imaging element
JP2004004206A (en) * 2002-05-31 2004-01-08 Matsushita Electric Ind Co Ltd Projection-type display device
JP2008517348A (en) * 2004-10-19 2008-05-22 レイセオン・カンパニー Optical mounting body for positioning and adjustment with 6 degrees of freedom
JP2008292778A (en) * 2007-05-25 2008-12-04 Sony Corp Lens device and imaging apparatus
JP2010008761A (en) * 2008-06-27 2010-01-14 Sharp Corp Optical scanner and image-forming device equipped with the same
JP2014071195A (en) * 2012-09-28 2014-04-21 Seiko Epson Corp Projector

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2020091336A (en) * 2018-12-03 2020-06-11 Thk株式会社 Electric alignment device and lens alignment system
WO2020116373A1 (en) * 2018-12-03 2020-06-11 Thk株式会社 Alignment device and lens alignment system
JP7248414B2 (en) 2018-12-03 2023-03-29 Thk株式会社 Motorized Alignment Device, Lens Alignment System
JP2021018103A (en) * 2019-07-18 2021-02-15 Thk株式会社 Alignment device and lens alignment system
JP7163252B2 (en) 2019-07-18 2022-10-31 Thk株式会社 Alignment device, lens alignment system

Also Published As

Publication number Publication date
US20190033696A1 (en) 2019-01-31
CN108475003A (en) 2018-08-31
JP2017129711A (en) 2017-07-27
US10571785B2 (en) 2020-02-25
JP6721990B2 (en) 2020-07-15
CN108475003B (en) 2021-03-02

Similar Documents

Publication Publication Date Title
US10394109B2 (en) Projector suspension device
WO2017126426A1 (en) Lens alignment adjustment device and projector equipped with same
US7061699B2 (en) Projection lens, producing method of projection lens and projector having projection lens
JP2008250277A (en) Projection-type display device
US20160011495A1 (en) Projection type image display device
US9482934B2 (en) Projector
JP2011059459A (en) Image projection device and image display device
JP6070749B2 (en) Projection optical device and projector
US20130016322A1 (en) Reflective polarizing plate apparatus, electro-optic apparatus, optical apparatus, and projector
JP6003365B2 (en) Optical device, projector, and method of manufacturing optical device
JP6036861B2 (en) Projection optical device and projector
JP2009008887A (en) Optical part, optical unit, and display device
JP6623693B2 (en) Projection optics and projector
TWI572969B (en) Optical compensation element adjustment mechanism and projector
CN210954573U (en) Optical module and projector
JP2003172975A (en) Casing for optical components, optical unit, and projector
JP6083440B2 (en) Projection optical device and projector
US20220155550A1 (en) Mounting member and projection optical apparatus
JP2015152843A (en) projector
JP2009008888A (en) Optical component, optical unit, and display device
JP2017078733A (en) Projection optical device and projector
JP5614053B2 (en) Projection lens device and projector
JP2016080817A (en) Projection type display device
JP2017227797A (en) Trapezoidal distortion correction mechanism, projection optical device and image projection device
JP2005128489A (en) Optical apparatus attachment method, projection lens attachment method, position adjustment apparatus and projector

Legal Events

Date Code Title Description
121 Ep: the epo has been informed by wipo that ep was designated in this application

Ref document number: 17741306

Country of ref document: EP

Kind code of ref document: A1

NENP Non-entry into the national phase

Ref country code: DE

122 Ep: pct application non-entry in european phase

Ref document number: 17741306

Country of ref document: EP

Kind code of ref document: A1